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Show [ 174 J 94 Po~onitfm creruleum, (Linn., Hook.) Red Buttei' on the UpR<'r Nortl1 for] of the Platte, .a ltu. mile, (Hook.) Highest parts of the mountainfi, noa~ perpetual $11,0W. Augu,st 13-15. Gilia ( Canft~a) longijloro, (Torr.) Sand hills of the Platte. ~'Pl<'mher 16. G. pulchella, (Doug!.) Upper part of the Swcrt \Vater, ncar the mountains. Augll!lt 7-20. G. inconspiwa, (Doug!. 1) Goat if11and, Upper North fork of the Platte. July 30. This ilifl'~rt from the Oregon plant in it~ flc:;hy, simply pinuatified Ienvr~, with ovate, obtuse !l<'gment.~. CONVOLVULA.CE.'E. Calystcgia ae-piwn, (R. llr.) Forks of the Platt<~. July 2. Ipomrea leptopliy!la, n. ~p. ::Stems branching from tho bHsr, pro:;trntc, glabrous, angulnr; leaves Janccolotc-linenr, vrry arut<', rntire, attenuate nl the bose into a petiole; peJunclcs 1 to 3-fiow. <'red; sepals roundi;.;h-ovah', obtuse with n minull' Jnucro.-li'orkf; of the Platte to Laramie river. July 4-8eptemhcr 3. fmperf!'ct Sl)('cimrns of thi;; plnut were collertrd about the sources of the Canadian, by Dr. James, in Lon ~',: expedition; but th<'y were not de,;cribed in my account of his plant<;. The root, according to Dr. JomeEl, is nnuuul, producing n umerous thick prostrate, but not twining ,;trms, which are two feet or moro in length. The lrnves arc from tw~ to four inches long, acute at each end, :.trongly veinod and omewhat coriareou,;. Pcdundt an inch or morc in IL'n~th; tho:,o toward,; the extremity of tlw bmnches only 1-flow<'rt'd; the , lower ones bearing 2, 3, and soJnelim<'s 4 flower~', which arc n<'arly the si1.e of those of caly~· tcgia sopium, and of a purp\i;.h color. ;:;cpals apvre:;scd, ttbout live lines long. 'orolla cam. panulatc-funnrl fi.>rnt, the tuht• mnch longer t ~ an the caly ·c Stamens iuserted near the bllSC of the corolla; fil ,uuents villom; ut the huse; anthers ohlong--Iint'nr. largr. lyle as long as thr ~;tnmenE~; stigma 2-lohed; tht' loht·s capitate. On\ry ~-celled, 11 ith two ovules in each cell. ~OLANA(.;EJE. .l\!fclcrium lutewu, (Donn c·at.) South Jork of lllC Platte. J uh 4 . P!tysalis pubescens, ( WillJ.) Upper l\orth fork of the Platk. .lui) 2:3. P. pumila, (N utl. ) "V. ill1 thr prrcrding. GENTL\NAC:l:.: .I·~. Gentiana nrctophi!lt ,J dcnMjlura, l Griseb. ? iu Hook. 1•'1. Bor . • \m. u, pa~c (i 1.) t'wt'nt Wute of the Platte. . \.ugm;t 4. 1 G'. ajjinis, (Grisch.) North fork of the Platt!'. September 9. U · pneumonanllte, ( Linn. ) Lanllllic river to Litfle Handy crrek. Ill t lle uwuutallls. July 12- August R. G. Fremontii, 11. sp. . 'll'lll hranchrd at thr uase; hrandm; 1-flowcrcd; l<:avc-; Q\ 'UitJ, I'Uspitlntc, cartilaginous on the Jnarg-in, rrc·cl; corolla fuund-form; plicm hmall, sligh l y ~-toothrd; cap· s ulc ovate, at leug tlt l'ntirrl} C'- rte•l on its thick Htipe.-'Wiuu ri , cr mountains.-.\1 nun!. Branches srvrral, 2 to :l inehc;; long, or nrarly rquallt•ngth. Lf'avc;; aloont threo line!> loug, wtth a strong whitish cartilagiuou., border, hortc•r than the internodt•s. Flowers as large u.; tho,e of G · prostraltl, l)C .tamcrou ·. Galy:>. two-thirds the lrng' h of tJu~ 1·orolla; the tr·eth about onethird the length of the lUll('. l'licu; Of the 0orolla S<':HwJy Olle-tbinJ m; lOJJg' as the bnceolole lobe::;. tamcJts ineluJed; au:hrrs obion~, :,Or1Jcwhat cordutr at the huH'. C:apsule iu maturity, and after dchiseruC'r, (in which stat all our spccirucus were t:ollectcd,) t'..\Serted quite !Je. yond the corolla, and, w1th its long stipc, reseilluling a sf) IP- with a large hilamellute Rtigmo. None _of the cap. ules contairwd any ~cc1ls. Thi'l specie,; is nenrly related to G. prostralo, (Haenk,) and G. humili11, ( 't1•v.,) but the forml'r ha-> i-patulatc obtu ·c rccurved lcavrs, and the latter entire plica:-, which arc nearly the length of the eorollu. In U. lmmili:s, anti in the allied G. squarrosa, (LeJeb.,) the capsule is exscrtetiafter d~cl1arging tho ~ceds. Swertia pcrennis, {1 obtusa, (Hook.) From L aramie river to the Big Dultcr. F~a.sera apeciosa, (Hook.) Defiles of the Wind river mountain!'. August 13-14. Lutanthus Russelianu11, (Hook.) Lower Platte to the forks. J uly-St>pternber. 95 [ 174 ] APOCYNACE}E . Apocynum catma&inwn, ( L iun.) On the Platte. A GLEPIADACE.£. Asc~'.·t pt• as sp._".~_·t 080, ( 'forr' in Ann. L)·c. N. Y ork, ii, p. 218.-A Douglasii, H. ook. F. l. B. or. Am• u.. , P· 53' t . 142. ) Forks of the Platte. July 2. Collect tl also by Mr N1collet m h.t sNorth-western expedition. Hooker':; plant tliflcrs in no essential ch aracters from my A. spectosa, col· Jeered by Dr. James in J,ong':; fir~t expedit ion. A verticillata, (Linn.) mall variety. W ith the preeeJin~ . A. luberosa, (!.inn·.) Kan Ras rivt'r. June 19. Ana.ntherix vi1·idis, (Nutt.) B ig l\luc river of the Kansa1:1 . .June 20. Ace~·ateh· kmg,folia, (Ell. ) Polyotus longifolia. ( N utt.) With the preceding. A. angust,folius. Polyotus aHgustifolius. (N uti ) With the preceding. OLEACE1E. F1·azinui platycarpa, (Michx.) Leaves only. Lower Pl:ltte. PLANTAGI A E!R Plantago eriopoda, (T orr. , in Ann. I ,yr. N. York, ii, p. 237. ) Mouth of the wcct W ater. July 31 . p, gnap~aloidcs , ( Nutt. ) Littlr Blur river of the Kansas. June 24. C:JIENOPODIA (.;E .~. Chenopodium zosterifvlium, (H ook,) Platte. I C. album, ( Linn. ) North fork of thf' P latte. July 12. 0/ione cane.~cma, ( Yl oc'l· Glwnop., p. 74. ) A triplex cunr,.crns. (I\ utt.) the Platte. July 26 . Cycloloma plafypllyllu, ( 1\focq., I. ('. p. 1 ) Kuehia dentatu, (Willd.) Platte. • cptcmher 4. With tlw preceJl!lg-. TJ pper N orth tork of N or1h for~ of the Stteda maritima, ( 7\lol'q. , I. r. P· 12"/.) Eurotia lanaln, (Mo<·q., I. c. V· 1. ) Dioti,~ lanata, ( Pu rf;h.) Red Duttcs to the mountain s. August 18-25. Frenumtia, 11• gen. Flowers didinous, monrecious and 1 dioirous, hetffomorphour;. St:.un. Fl. in terminal aments. :-·kales c1·cctJtriea lly peliate, on a short st ipe, angular, somewhat cuspidate upward. tallll'll~ ·.z, :l, and 4 nnder each t::calc, nakrtl, st·:::silc; anthrrs ohh,ug. P ist. Fl. 1<olit.ary, axillary. 1)crigoniuw dol'ely adlwring to the lowN half of the ov:try, the border entire, nearly ob'oictc, but in fruit l'ldarg-iug- into a utoad hori'l.ontal ;wgular unrl tmtlulatf' wing. Ovary ovate; styles tltirk, divaricatr; stigmas liurn.r. fn1it a utridr, tho lnwer two-thirds covcrt?.d 1\ith tl1e indurated 1'<11) x, eompr<·s.'lcd. , N·d vertical; intrgumrut doultlc. Eml>ryo Hot-spiral, ( 2 to 3 turn ~. ) gn·1'Jl; radicl,· inti·rior; allourn<'Jl nonf'. F. venniculari.~·. (Boti.? 1·rrmil'tdaris, H oole) n . Bor .. \ nwr. ii, P· 12~. Upp<'r North tork of the Plattr, JH'nr tlw mouth of the. 'wr\'1 Watl'r. July 30. \low glabrous, diflus1•ly brunched ~hrub, clotht'd with a "hit i.,h hark. LL'!I ' r,; altt•rnat.r, linrar, IIP~hy, and nlmost s<'m it<>rett•, 6 to 12 lines Jon~ .md 1 to 2 Jirw.~ wide. ."'taminatP a n1e11t,; ahout thr •e-fomths of au inch long, cylindrical, at fir"i tll'nsl', and I'OrnpoRr•l of closrly cou1pactl"d ang u lar Hra l e~, covcriug nal(l•d anther:;. Anthers H'l'\' dt·!'iduous. Ft>rtilc flowers in thr. :niln of the rorne!ll lea tH. ('aly x. closely adhrreut, nn;l ut fir;;t \\ itlt olllj an obscure bonler or limb, hut ut leng th. formiug .a wing 3 to 4. Iinrs in diamctu, 1 l'~l mhlin~ that or :-ialSLlla. Thi~ T<'nl"-1 knble plant, \ , hlrh I dedll':llf' to Lieutenant Fr~mont, \\llS lin-t rollerlt'(l by Dr . .J ar:-ws about the sourc<'s of tbc Ga111dian, (in Long's expedition,) but it \IUS omitll'd in ffi} arro\lltt of his plank, published in the Annuls of the Lyceum of N atunll lfi ... tory. It is unJoubtrdly lhr hntisl \Crmieulalis of H ook<'r, ~1. c.,) collected on the barren grounds of the Oregon river hy thl· late Mr. Douglas, who fonnd 1t wJth only the staminate flowers. vV c have it now !rom a thinllorulity, so tl1ut tho plru1t mu~t be |